14 AMERICAN BOLETES 



slightly viscid when wet, purplish-brown, smoky-red or choco- 

 late-brown, at times lilac-tinged, darker when bruised; margin 

 entire, concolorous; context firm, gray or slightly reddish, some- 

 times nearly pure-white, changing to pale-flesh-colored, taste 

 mild; tubes adnate, at length depressed, nearly plane, colored 

 nearly like the pileus, becoming deep-chocolate-brown with 

 age, mouths minute, subcircular, stuffed when young; spores 

 oblong, smooth, brownish-ferruginous, 1 1-15 X 4-6 M; stipe 

 cylindric, subequal, solid, minutely squamulose or coarsely 

 granular, slightly paler than the pileus, greenish-purple within, 

 5-14 cm. long, 1-3 cm. thick. 



Frequent in thin woods and on roadside banks from Nova 

 Scotia to North Carolina and west to Kentucky. 



17. CERIOMYCES CRASSUS Batt. 



Pileus thick, broadly convex, gregarious or cespitose, 6-20 

 cm. broad, 3-4 cm. thick; surface smooth, glabrous or finely 

 tomentose, subopaque, dry, slightly viscid when moistened, 

 sometimes pitted or reticulate-rimose, varying in color from 

 ochraceous-brown to reddish-brown, sometimes paler; margin 

 acute, entire; context compact, 2-3 cm. thick, unchanging, 

 white or yellowish, sometimes reddish beneath the cuticle, taste 

 sweet and nutty; tubes adnate, at length depressed, plane in 

 mass, white and stuffed when young, yellow or greenish-yellow 

 when mature, changing to greenish-ochraceous when wounded, 

 about 2 cm. long, mouths of medium size, angular, edges thin; 

 spores fusiform, smooth, greenish-yellow to ochraceous-brown, 

 12-15 X 5~6 M; stipe subequal or enlarged below, stout, con- 

 colorous or considerably paler, becoming bluish or discolored 

 when wounded, wholly or partially reticulate, solid, tough, 

 fibrous, yellowish within, tinged with red at times near the 

 surface, 5-10 cm. long, 3-4 cm. thick. 



Very common in woods and groves throughout temperate 

 North America. One of the very best edible fungi, and much 

 used for food in other countries. 



1 8. CERIOMYCES AFFINIS (Peck) Murrill 



Pileus convex to plane, gregarious or scattered, 5-9 cm. broad; 

 surface glabrous or nearly so, slightly viscid when moist, but 

 usually dry, with a thin, separable cuticle which easily cracks 

 or rubs off in spots, fulvous, pale-chestnut, ochraceous, or 

 somewhat olivaceous; margin rather obtuse, entire, slightly 

 projecting beyond the tubes; context somewhat spongy, white, 



